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Full Discussion: Backup and restore
Operating Systems AIX Backup and restore Post 302562772 by rbatte1 on Saturday 8th of October 2011 07:44:09 AM
Old 10-08-2011
Assuming that this is AIX, you define the PP size when creating/restoring the volume groups. There are a few issues to consider though:-
  1. Have you got a mirrored rootvg?
    . If so, then you have a problem. It will require two disks to restore to and create the mirrors. You cannot stop this without serious hacking before the backup is taken.
    . If you are not mirrored on the live server then you could lose the server with a single disk failure. Smilie Generally on a system with 10 local disks, you can expect a failure on one of them every 3 years. Fewer disks I suppose means there are less to go wrog, so perhaps a lesser risk (arguable) but then you have much more chance of it being catastrophic. Do you feel lucky? Smilie
  2. Is your rootvg definition up to date?
    . Make sure you run mkszfile before the mksysb to ensure that the defintion is recreated. If you don't and fileystems have been grown, then it is possible that the data will not fit in based on the old definition.
  3. How are you restoring your datavg?.
    You can either use savevg to grab the lot, or you can use savevg to save just the structure, allowing you to use a bespoke backup or 3rd party software to backup the data. The same issues over mirrors a sufficient disks to recover to exist. There are options to work on removing mirrors as I have this issue too in that live server is local mirrored disk, DR is SAN provided disks, so RAID behind the scenes means I do not need AIX mirrors.

Can you describe a bit more what you have and/or need. Smilie




Robin
Liverpool/Blackburn
 

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volrootmir(8)						      System Manager's Manual						     volrootmir(8)

NAME
volrootmir - Mirror areas necessary for booting to a new disk SYNOPSIS
/usr/sbin/volrootmir [-a] [nconfig=count] target_disk [swap=target_partition] OPTIONS
Specifies that all volumes on the system disk be mirrored, not just the root and swap volumes, rootvol and swapvol. DESCRIPTION
The volrootmir script causes a mirror copy of areas of the root disk involved in booting to be made on the specified target disk. When used without the -a option, volrootmir adds mirrors of the root and swap volumes and allocates them on the new disk. In addition, all disk regions required for booting are set up and partitions for the new volume mirrors are created. When used with the -a option, volrootmir mirrors all in-use partitions on the system disk. To mirror a swap volume that is on a separate disk from the root volume, the swap attribute must be used to specify a separate target for the swap mirror. The target disk(s) must be at least as large as the sum of the sizes of rootvol and swapvol. Also, the physical disk should not have any disk partition in use. This script can be called from the voldiskadm menus by choosing the Mirror volumes on a disk operation. ATTRIBUTES
Specifies the number of log copies and copies of the configuration database, for example, nconfig=2. Specifies that the swap volume, swapvol, be mirrored on a separate disk, as specified by target_partition. EXAMPLES
The following command mirrors the rootvol and swapvol volumes onto the target disk, dsk3. This command will fail if swapvol is on a differ- ent disk from rootvol. # volrootmir dsk3 The following command mirrors rootvol, swapvol, and any other volumes on the root disk onto the target disk, dsk3. This command will fail if swapvol is on a different disk from rootvol. # volrootmir -a dsk3 The following command mirrors rootvol on disk dsk3, swapvol onto partition dsk7d, and any other volumes on the root disk onto disk dsk3. This command will fail if swapvol is on the same disk as rootvol. # volrootmir -a dsk3 swap=dsk7d The following command mirrors rootvol onto disk dsk3 and swapvol onto partition dsk7d. This command will fail if swapvol is on the same disk as rootvol. # volrootmir dsk3 swap=dsk7d SEE ALSO
volintro(8), voldiskadm(8) volrootmir(8)
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